--- title: "Converting a PDF to a TIFF using color detection in C#" canonical_url: "https://www.nutrient.io/guides/dotnet/samples/pdf-to-tiff-color-detection-cs/" md_url: "https://www.nutrient.io/guides/dotnet/samples/pdf-to-tiff-color-detection-cs.md" last_updated: "2026-05-14T21:57:26.872Z" description: "Learn how to efficiently convert PDF documents to high-quality multipage TIFF files using a color detection plugin while minimizing file size." --- # Converting a multipage PDF to a multipage TIFF using color detection in C# This example shows how to convert an existing PDF document to a multipage TIFF file using the color detection plugin to produce the best quality output while keeping the output file size as low as possible. [Get Started](https://www.nutrient.io/sdk/dotnet/getting-started.md) [All Samples](https://www.nutrient.io/guides/dotnet/samples.md) [Download](https://www.nutrient.io/guides/dotnet/downloads.md) [Launch Demo](https://www.nutrient.io/demo/) --- ### C# [C#](https://www.nutrient.io/guides/dotnet/samples/pdf-to-tiff-color-detection-cs.md) ### VB.NET [VB.NET](https://www.nutrient.io/guides/dotnet/samples/pdf-to-tiff-color-detection-vbnet.md) ```cs //We assume that GdPicture has been correctly installed and unlocked. const string INPUT_DOCUMENT = "input.pdf"; const string OUTPUT_DOCUMENT = "output.tif"; const float DPI = 200F; GdPicturePDF oGdPicturePDF = new GdPicturePDF(); GdPictureImaging oGdPictureImaging = new GdPictureImaging(); if (oGdPicturePDF.LoadFromFile(INPUT_DOCUMENT, false) == GdPictureStatus.OK) { int tiffID = 0; for (int i = 0; i < oGdPicturePDF.GetPageCount(); i++) { oGdPicturePDF.SelectPage(i + 1); //Rasterizing a page or extracting a page bitmap. int rasterPage = oGdPicturePDF.RenderPageToGdPictureImageEx(DPI, true, System.Drawing.Imaging.PixelFormat.Format24bppRgb); if (oGdPicturePDF.GetStat() == GdPictureStatus.OK) { //Defining the compression of the tiff page. Let's use CCITT4 for bitonal pages and JPEG for others. TiffCompression tiffCompression; //Applying color detection and color depth automatic conversion. oGdPictureImaging.ColorDetection(rasterPage, true, false, false); if (oGdPictureImaging.GetBitDepth(rasterPage) == 1) { tiffCompression = TiffCompression.TiffCompressionCCITT4; } else { tiffCompression = TiffCompression.TiffCompressionJPEG; } if (i == 0) { if (oGdPictureImaging.TiffSaveAsMultiPageFile(rasterPage, OUTPUT_DOCUMENT, tiffCompression) == GdPictureStatus.OK) { //Firstly rasterized page's GdPicture ID becomes the multipage tiff id. tiffID = rasterPage; } else { MessageBox.Show("Error occurred when saving the file. Status: " + oGdPictureImaging.GetStat().ToString(), "Color Detection Example", MessageBoxButtons.OK, MessageBoxIcon.Error); break; } } else { if (oGdPictureImaging.TiffAddToMultiPageFile(tiffID, rasterPage, tiffCompression)!= GdPictureStatus.OK) { MessageBox.Show("Error occurred when adding a page. Status: " + oGdPictureImaging.GetStat().ToString(), "Color Detection Example", MessageBoxButtons.OK, MessageBoxIcon.Error); break; } oGdPictureImaging.ReleaseGdPictureImage(rasterPage); } } else { MessageBox.Show("Error occurred when rendering the page. Status: " + oGdPicturePDF.GetStat().ToString(), "Color Detection Example", MessageBoxButtons.OK, MessageBoxIcon.Error); } } oGdPictureImaging.TiffCloseMultiPageFile(tiffID); oGdPictureImaging.ReleaseGdPictureImage(tiffID); } else { MessageBox.Show("The file can't be opened. Status: " + oGdPicturePDF.GetStat().ToString(), "Color Detection Example", MessageBoxButtons.OK, MessageBoxIcon.Error); } oGdPicturePDF.Dispose(); oGdPictureImaging.Dispose(); ``` This code sample is an example that illustrates how to use our SDK. Please adapt it to your specific use case. --- ## Related pages - [Automatically rotate pages of a multipage TIFF file using OCR and VB.NET](/guides/dotnet/samples/auto-rotate-tiff-vbnet.md) - [Automatically rotate pages of a multipage TIFF file using OCR and C#](/guides/dotnet/samples/auto-rotate-tiff-cs.md) - [Convert PDFs, MS Office, and images to TIFF in C#](/guides/dotnet/samples/convert-to-tiff-cs.md) - [Saving images into folders based on their barcode](/guides/dotnet/samples/barcode-auto-sorting-cs.md) - [Saving images into folders based on their barcode](/guides/dotnet/samples/barcode-auto-sorting-vbnet.md) - [Generate a multipage TIFF file using a compression mode per page in C#](/guides/dotnet/samples/create-multipage-tiff-cs.md) - [Converting a Microsoft Word binary file document (DOC) to a Microsoft Word OpenXML document (DOCX) in C#](/guides/dotnet/samples/doc-to-docx-cs.md) - [Merging two PDF documents by alternating pages from both files in VB.NET](/guides/dotnet/samples/merge-pdf-alternate-pages-vbnet.md) - [Using an external OCR engine during PDF/OCR generation](/guides/dotnet/samples/integrate-omnipage-ocr-cs.md) - [Merging two PDF documents by alternating pages from both files in C#](/guides/dotnet/samples/merge-pdf-alternate-pages-cs.md) - [Converting a multipage PDF to a multipage TIFF using color detection in VB.NET](/guides/dotnet/samples/pdf-to-tiff-color-detection-vbnet.md) - [Recompress existing PDFs using MRC compression in C#](/guides/dotnet/samples/recompress-pdf-mrc-cs.md) - [Recompress an existing PDF using color detection in VB.NET](/guides/dotnet/samples/recompress-pdf-vbnet.md) - [Recompress an existing PDF using color detection in C#](/guides/dotnet/samples/recompress-pdf-cs.md) - [Recompress existing PDFs using MRC compression in VB.NET](/guides/dotnet/samples/recompress-pdf-mrc-vbnet.md) - [Highlight and crop an image in C#](/guides/dotnet/samples/select-image-crop-area-cs.md) - [Highlight and crop an image in VB.NET](/guides/dotnet/samples/select-image-crop-area-vbnet.md) - [Highlight a region in PDF or an image in VB.NET](/guides/dotnet/samples/select-pdf-image-region-vbnet.md) - [Choosing the appropriate OCR zone in C#](/guides/dotnet/samples/select-ocr-zone-cs.md) - [Highlight a region in a PDF or an image in C#](/guides/dotnet/samples/select-pdf-image-region-cs.md) - [Choosing the appropriate OCR zone in VB.NET](/guides/dotnet/samples/select-ocr-zone-vbnet.md) - [Save bitonal TIFFs with VB.NET using photometric 0](/guides/dotnet/samples/tiff-photometric-vbnet.md) - [Convert a multipage TIFF to a multipage JBIG2 in VB.NET](/guides/dotnet/samples/tiff-to-jbig2-vbnet.md) - [Save bitonal TIFF images with C# and CCITT4](/guides/dotnet/samples/tiff-photometric-cs.md) - [Convert a multipage TIFF to a multipage JBIG2 in C#](/guides/dotnet/samples/tiff-to-jbig2-cs.md)